Geology Lecture Exam 3

Geology Lecture Exam 3 - EVOLUTION OF THE EARTH (51-109)...

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EVOLUTION OF THE EARTH (51-109) STUDY GUIDE FOR LECTURE EXAM-3 General 1. Know the geologic time scale including the epochs of the Cenozoic and the absolute age dates of the boundaries of the Paleozoic, Mesozoic, and Cenozoic eras ( PDF , JPG ). 2. Be able to define clastic wedge and state its significance for paleogeographic reconstruction. 3. Know that the timing of an orogeny can be interpreted from radiometric age dates of the associated igneous intrusions and metamorphic rocks, from cross-cutting relationships of associated deformation, and from biostratigraphy of the associated clastic wedge. 4. Be able to define foreland basin and rift basin and discuss the tectonic mechanisms that result in the formation of such basins. 5. Be able to describe the following features and their significance for rifting and break up of continents: hot spot, triple junction, and aulacogen. 6. Know that reefs form mound shaped deposits because they are constructed by in place accumulation of calcium carbonate skeletons of marine organisms. 7. Understand the process of continental accretion (enlargement of continents by the accretion of island arcs and microcontinents along subduction zones). 8. Be familiar with the features in sedimentary rocks that are useful indicators of climate: karst, coal, saprolite, evaporites, red beds, eolian sandstones, marine limestones, and glacial deposits. 9. Know the different types of unconformities: angular unconformity, disconformity, and nonconformity. 10. Know what a thrust fault is. Also know what a growth fault is. 11. Understand how climate fluctuations of the Cenozoic can be interpreted from the oxygen isotope record of deep sea sediments. Late Paleozoic
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1. Essay. Given maps of global plate reconstructions be able to describe the movements of the continents and timing of continental collisions that resulted in the assembly of Pangea. Be able to identify, from the maps, the Panthalassia ocean and Tethys seaway. (practice question) 2. Be able to state specifically what continental collisions occurred along the eastern and southern margins of North America during the Allegheny orogeny and in what modern mountain ranges the orogeny is represented. 3. Ancestral Rockies: When and where did these mountains form? Know what tectonic process is inferred to have resulted in the uplift of these mountains. 4. Be able to discuss the general patterns of transgression and regression, sedimentary facies, and unconformities of the Kaskaskia and Absaroka sequences in North America. (Graphic JPG , PDF ). 5.
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Geology Lecture Exam 3 - EVOLUTION OF THE EARTH (51-109)...

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